Fumigant carrier combination



June 7, 1938.

H. JKLANGHORST FUMIGANT CARRIER COMB INATION Filed April 27, 1936 2Sheets-Sheet 1 I NVENTOR. /%4/?/?/ c/ lfm a a/Pa ATTORNEY.

June 7, 1938. H. J. LANGHORST 2,120,204 I FUMIGANT CARRIER COMBINATIONFiled April 27, 1936 2 Sheets-Sheet 2 INVENTOR. BY /74/P/P/c/l/r/yw/afisz;

ATTORNEY.

Patented June 7, 1938 UNITED STATES 2,120,204 mnmean'r comm-1RCOMBINATION Harry J. Langhorst, Larchmont, N. Y., assignor to AmericanCyanamid & Chemical Corporation, New York, N. Y., a corporation ofDelaware Application April 2'1,

2 Claims.

The present invention relates to an improved fumigant combination, thatis, an absorbent carrier having absorbed therein a volatile fumigant.

There is on the market today, a product known 5 as Zyklon Discoids".

These articles are comparatively thin cellulosic discs having absorbedtherein liquid hydrocyanic acid. They are normally packed in tins whichcontain a definite number of these discs and a definite quantity ofliquid hydrocyanic acid so that each disc is known to containsubstantially the same predetermined quantity of liquid fumigant. It,therefore, becomes a matter of simple calculation to determine thenumber of discs necessary 16 for a space to be fumigated, based upon thecubic contents of the space and the quantity of hydrocyanic acidrequired to fumigate that space.

The present invention is an improvement upon the fumigant combinationabove described and has for its object the arrangement of such discs orother absorbent carrier in such form that they or it may be collapsedupon itself during shipment and storage but which in use, may beexpanded to expose substantially the entire area thereof to permit theliquid fumigant to volatilize.

To this end, the invention contemplates any absorbent carrier which maybe collapsed upon itself either in the form of discs or other areasseparately made and subsequently attached together, this arrangementmaking possible the collapsing of the carrier upon itself so that thethus collapsed carrier may be placed in the container during shipmentand storage. Upon use, the carrier may be expanded, that is, unfolded,the desired area. of carrier separated from the remainder and placedwithin the space to be fumigated, preferably in an expanded condition soas to facilitate vaporization of the fumigant.

Any liquid fumigant which is readily volatile may be used, althoughliquid hydrocyanic acid is preferred either with or without a warningmaterial such as cyanogen chloride, chloropicrin, or other warningmaterials. In some cases, a

5 iachrymatory warning agent may be used.

The invention further consists in the novel arrangement, combination andconstruction of parts more fully hereinafter described and shown in theaccompanying drawings.

In the drawings:

Fig, 1 is a fragmentary perspective view showing the manner of removalof the absorbent material from a container;

Fig. 2 is a partial front elevation;

Fig. 3 is a fragmentary sectional view showing 1936, Serial No. 76,576(Cl. 299-24) the manner of collapsing one modification of the invention;

Fig. 4 is a view similar to Fig. 2 showing a modified form of theinvention;

Fig. 5 is an edge view of Fig. 4.

Referring now with particularity to the embodiments illustrated in Figs.1, 2 and 3, absorbent areas are shown at l of some suitable materialcapable of absorbing or holding within its pores a volatile fumigant.Cellulosic mate- 1o rial has been found to be admirably adapted forthis'purpose and specifically wood pulp. As the absorbed fumigant,liquid hydrocyanic acid is preferred, .either with or without warningagents due to the fact that this material is readily and I completelyvolatile. Any other type of absorbent and fumigant may be used whichwill permit requisite quantities to be absorbed and subsequentlyreleased upon exposure to the atmosphere within the space beingfumigated.

The areas I are preferably tied together by means of a strip 2 which, inthis case, extends between the areas and throughout a diameter thereof.This strip may be of paper, cloth or the like adhered to the areas I bymeans of any 25 suitable adhesive which is not soluble in the liquidfumigant.

K container is shown at 1 adapted to contain a plurality of theseabsorbent areas in a collapsed condition as shown in Fig. 3. when a sopredetermined number of these absorbent areas are placed in thecontainer and a predetermined quantity of liquid fumigant added to thecan, each of the areas will absorb its proportionate share of thefumigant. Consequently, a uniform as and known quantity of fumigant willbe contained within each area.

When fumigating with these areas, it only becomes necessary to decidethe number of discs desired to be placed in the space tobe fumio gatedand to tear off the necessary number and place them in that space.

In order to assist in the volatilizatibn of the liquid fumigant,perforations 4 are provided so that such discs may be hung or suspendedwithin the space to be fumigated to expose both sides thereof.

Where more than one area is placed within a space to be fumigated, suchnumber being tied together, the operator is always sure that the numberof areas placed in the space are removed after the fumigating period.

In Figs. 4 and 5 another form of tying the areas together is shown toconsist of a sewed element 8 with a section 9 in between discs fromsired.

It will be apparent the combination here- (2) facilitates removal of theareas from the container; (3) permits ready exposure or both sides ofthe absorbent when suspended in the space to be iumigated and thusfacilitates volatilization oi the tumigant; and (4) the tie acts as asupport for a suspended string of areas otherwise being perhaps notstrong enough to sustain their weight plus that of the liquid fumigant.

While the invention has been shown and described with particularreference to speciilc embodiments, it is to be understood that it is notto be limited thereto but is to be construed broadly and restricted onlyby the scope oi the claims.

' I claim:

9,190,904 which the discs'may be suspended where de- 1. An e xpandibleand collapsible fumigating article comprising, 'a plurality of absorbentcarriers each having a large surface area relative to its thickness andhaving a volatile liquid fumi'gant absorbed therein, in an amountinexoess oi. that occurring by nature in said absorbent carriers, andflexible, elongated, and

easily severable suspending means amxed to and. connecting said carrierswitheach other in series capable of being collapsed upon each other insurface to surface contact for shipping and storage purposes.

' 2. An article for fumigating purposes as claimed in claim 1, in whichthe carriers are absorbent discs.

' HARRY J. LANGHORBT,

